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hydrogen ['haɪdrəʤ(ə)n] n
chem.	υδρογόνο (hydrogenium)
med.	υδρογόνο
hydrogen A flammable colourless gas that is the lightest and most abundant element in the universe. It occurs mainly in water and in most organic compounds and is used in the production of ammonia and other chemicals, in the hydrogenation of fats and oils, and in welding ['haɪdrəʤ(ə)n] n
environ.	υδρογόνο

hydrogen: 208 phrases in 22 subjects

Agriculture	8
Chemistry	70
Earth sciences	4
Economy	1
Electronics	11
Energy industry	7
Environment	9
Food industry	20
General	7
Health care	1
Industry	2
Materials science	1
Mechanic engineering	3
Medical	26
Metallurgy	15
Natural sciences	6
Nuclear physics	1
Obsolete / dated	2
Oil / petroleum	1
Pharmacy and pharmacology	2
Technology	1
Transport	10